Athlete running Caucasian blond woman.. The most common causes of neck pain are strain or tension in the muscles of neck. The function of the digastric muscle depends on its point of action. The trapezius muscle is innervated by the accessory nerve (CN XI). Grounded on academic literature and research, validated by experts, and trusted by more than 1 million users. Last's anatomy: Regional and applied. Learning anatomy is a massive undertaking, and we're here to help you pass with flying colours. Clinically Oriented Anatomy (7th ed.). Anterior intertransversarii colli muscles, Posterior intertransversarii colli muscles, Ventricles, meninges and blood vessels of the brain, Introduction to the musculoskeletal system, A large group of muscles in the cervical area, responsible for the movement of the head in all directions, If the mandible is fixed and the muscle is acting from below, it causes an, If the hyoid bone is fixed and the muscle acts from above, it, If the mandible is fixed, the muscle acts to, If the hyoid bone is fixed, the geniohyoid muscle, When the ribs are fixed and the muscle is acting from below, bilateral contraction of the anterior scalene causes, When the vertebral column is fixed, the muscle produces. The nerve supply to the posterior scalene muscle is derived from the anterior rami of spinal nerves C6-C8, while its blood supply comes from the ascending cervical branch of the inferior thyroid artery and the transverse cervical branch of the thyrocervical trunk. Reviewer: The superficial neck muscles are the most external and include the platysma and the sternocleidomastoid. The principal function of these muscles is flexion of the head to varying degrees. The middle scalene is the largest of the scalene muscles, that arises from the transverse processes of axis (C2) and atlas (C1), and the posterior tubercles of transverse processes of the vertebrae C3-C7. The main function of the longus colli is to flex the neck. Edinburgh: Elsevier Churchill Livingstone. The platysma inserts into several points, including the mandible, the skin of the lower face, lower lip and the corners of the mouth. Philadelphia, PA: Lippincott Williams & Wilkins. The anterior vertebral muscles are a deep group of muscles located just anterior to the cervical vertebral column. Its blood supply stems from the superior thyroid branch of the external carotid artery, and inferior thyroid branch of the thyrocervical trunk. To perform clinical neck treatment that is accurate and specific, the therapist needs to know the attachments and actions of the muscles of the neck.For example, to know where to place the palpating hand when applying deep tissue work into the neck, the manual therapist must know the attachments of the target muscle to be worked to be able to locate the target muscle accurately. As other infrahyoid muscles, the omohyoid functions to depress the hyoid bone and larynx to reopen the laryngeal inlet after swallowing. The motion of the muscles of the neck are divided into four categories: rotation, lateral flexion, flexion, and hyperextension. The muscle is composed of a posterior and an anterior belly, connected by an intermediate tendon, which represents their common insertion point. Humans have well-developed muscles in the face that permit a large variety of facial expressions. The function of the sternohyoid muscle is to depress the hyoid bone and larynx after it has been elevated by the suprahyoid muscles. The stylohyoid muscle is innervated by the stylohyoid branch of the facial nerve (CN VII). Due to its direct attachment to the skin of the lower face, the platysma functions mainly as a muscle of facial expression. The main function of the middle scalene muscle is to produce an ipsilateral flexion of the neck, when acting from below. Kim Bengochea, Regis University, Denver, Author: The neck muscles, including the sternocleidomastoid and the trapezius, are responsible for the gross motor movement in the muscular system of the head and neck. Here are some of the key muscles attached to the cervical spine: Levator scapulae. They are further divided into 3 subgroups: The platysma is a sheet-like muscle that lies within the subcutaneous tissue of the anterior neck, superficial to the investing layer of deep cervical fascia. The function of the sternocleidomastoid muscle depends on whether the muscle acts alone or together with its contralateral counterpart. • The muscle originates by 2 heads: Sternal and Clavicular. These muscles are mainly responsible for the movement of the head in all directions. However, it is the back of the neck that is the most muscular. Your neck is flexible and supports the weight of your head, so it can be vulnerable to injuries and conditions that cause pain and restrict motion. Due to their small size, the function of these muscles is to only assists in lateral flexion of the head and to stabilize the cervical spine during movement. The omohyoid is a narrow muscle that connects the scapula to the hyoid bone. Anterior triangle is defined by the anterior border of the sternocleidomastoid muscle, inferior edge of the mandible and the midline of the neck. Similar Images . It originates from the skin and fascia overlying the region of the clavicle and passes superiorly along the neck. The mylohyoid is a sheet-like muscle that forms the majority of the floor of the mouth. MASTICATORY MUSCLES WHICH INCLUDES THE MUCLES THAT HELP IN THE MOVEMENT OF TMJ. Muscles of the neck: An overview: want to learn more about it? Our engaging videos, interactive quizzes, in-depth articles and HD atlas are here to get you top results faster. The levator scapulae plays a key role in bending and rotating the neck to the side, and these movements can be hindered if the muscle is … The innervation of this muscle comes from the anterior rami of spinal nerves C1 and C2, while its blood supply is provided by branches of the vertebral and ascending pharyngeal arteries. The suboccipital muscles act to rotate the head and extend the neck. In addition, the trapezius muscle stabilizes and produces movements of the scapula. It arises from the anterior tubercles of the transverse processes of vertebrae C3-C6, and inserts onto the scalene tubercle and the superior border of the first rib. Rotation describes the action of moving the head from side to side, lateral motion brings the ear to the shoulder, flexion moves the chin to the chest (as in looking down), and hyperextension moves the neck so that the head tilts upward. Gray's Anatomy (41tst ed.). Edinburgh: Churchill Livingstone. These upper back, shoulder and neck muscles travel in all directions which allows for greater range of motion and movement in the neck and shoulders. Most of us will have experienced episodes of muscle strain in our neck or shoulders, sometimes referred to as a “crick in the neck.” A stiff neck is almost always an acute problem. The anterior scalene muscle is innervated by the anterior rami of the spinal nerves C4-C6, and vascularized by the ascending cervical branch of inferior thyroid artery. The anterior neck muscles are a group of muscles covering the anterior aspect of the neck. In addition, the sternothyroid muscle can pull the thyroid cartilage away from the hyoid bone and further open the laryngeal inlet, which can aid forced inspiration. Its blood supply stems from branches of the occipital, superficial cervical, transverse cervical and dorsal scapular arteries. They consist of 3 main groups of muscles: anterior, lateral and posterior groups, based on their position in the neck. That group comprises the muscles of the back (nape) and side of the neck. The function of the anterior scalene muscle depends on its point of action and whether the muscle acts alone or together with its contralateral counterpart. Because the muscles are used to show surprise, disgust, anger, fear, and other emotions, they are an important means of nonverbal communication. 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